Chapter Nine Notes

Chapter Nine Notes - Given quantity is in moles, unknown...

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Chapter Nine Notes Stoichiometry Stoichiometry - relationships between amounts of elements in a chemical reaction Composition stoichiometry - deals with mass relationships of elements in compounds Reaction stoichiometry - involves mass relationships between reactants and products in a  chemical reaction  Reaction stoichiometry involves chemical equations and the Law of Conservation of Matter Chemical equation must be balanced to use r.s. Molar mass - mass in grams of one mole of a substance Mole ratio - conversion factor relating to amounts in moles of any two substances involved in a  chemical reaction The mole ratio is obtained directly from the chem. reac  Coefficients represent relative amounts in moles of reactants and products Four types of stoichiometry problems: Given and unknown quantities are in moles
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Unformatted text preview: Given quantity is in moles, unknown quantity is in grams Given quantity is in grams, unknown quantity is in moles Given and unknown quantities are in grams Limiting reactant- reactant limiting amounts of other reactants that combine and the amount of product that can form Excess reactant- substance not used up completely Theoretical yield- maximum amount of a product produced from a given amount of reactant Actual yield- measured amount of a product obtained from a reaction Percent yield- ratio of the actual yield to the theoretical yield, multiplied by 100 Amount of product obtained is usually less than the theoretical yield This is due to side reactions and purification of elements Percent yield Is also known as the efficiency of a reaction...
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This note was uploaded on 09/28/2010 for the course CHEM Chemistry taught by Professor Plants during the Spring '10 term at Clear Creek.

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